From: Linus Lüssing <linus.luessing@web.de>
Date: Thu, 17 Feb 2011 08:17:52 +0000 (+0000)
Subject: bridge: Use IPv6 link-local address for multicast listener queries
X-Git-Tag: v2.6.38-rc7~47^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fe29ec41aaa51902aebd63658dfb04fe6fea8be5;p=pandora-kernel.git

bridge: Use IPv6 link-local address for multicast listener queries

Currently the bridge multicast snooping feature periodically issues
IPv6 general multicast listener queries to sense the absence of a
listener.

For this, it uses :: as its source address - however RFC 2710 requires:
"To be valid, the Query message MUST come from a link-local IPv6 Source
Address". Current Linux kernel versions seem to follow this requirement
and ignore our bogus MLD queries.

With this commit a link local address from the bridge interface is being
used to issue the MLD query, resulting in other Linux devices which are
multicast listeners in the network to respond with a MLD response (which
was not the case before).

Signed-off-by: Linus Lüssing <linus.luessing@web.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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